Doyle, who has a close relationship with Collins, is said to have allowed the gang to transfer the stolen goods from one car to another in the car park next to his plumber's business - Associated Response.

The Irish father of two only stood trial over the laundering offence, and was not tried for conspiracy to commit burglary.

Doyle, of Riverside Gardens, Enfield, was the only defendant on bail and would happily talk to the press and officers throughout the case. He wore his work uniform to court everyday, and would sit in the dock taking notes.

Jurors heard that he had known Collins, Perkins and Reader for a number of years, and would often go drinking with them in pubs near Hatton Garden.

None of the men showed any reaction as they were convicted.

Another thief, known only as "Basil", let his co-conspirators into the building by opening the fire escape from inside. He has not been identified.

All of the men are due to be sentenced by Judge Christopher Kinch QC on March 7.

It can now also be reported that Perkins's daughter Terri Robinson, 35, of Sterling Road, Enfield, faces being jailed alongside him after she pleaded guilty to concealing, converting or transferring criminal property.

Her brother-in-law Brenn Walters, 43, who is also known as Ben Perkins, also admitted the same offence.

Doyle was readmitted to bail, with Judge Kinch saying: "He has been convicted, albeit of the slightest of counts on the indictment of any defendant in this case.

"Nonetheless, his conviction (is) in relation to involvement in an extremely significant matter, and one which is likely to carry or result in a custodial sentence.

"That said, I take the view that he has acted responsibly since being granted bail."